Call of the Dragon (4e Power)

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You draw forth the savagery that dwells in every dragon, compelling your enemies to fight without forethought or plan.

At-Will Primal, Implement, Psychic

Standard Action

Area burst 1 within 10 squares

Target: Each creature in the burst

Attack: Wisdom Vs. Will

Hit: The target can't gain combat advantage until the end of your next turn. In addition, on its next turn the target takes psychic damage equal to 5 + your Wisdom modifier when it makes any attack that doesn't include your ally nearest to it as a target.